How To Build A Fire Pit With Retaining Wall Blocks

Retaining wall blocks are easy to use and make a great material for building a fire pit. They’re also sturdy, durable, and can be used in all sorts of ways. Here’s how to build a fire pit with retaining wall blocks:

Select a spot for the fire pit.

Select a spot for the fire pit.

  • Select a level, dry area that’s not too close to trees or other structures. You’ll also want to make sure there is a water supply nearby just in case something goes wrong and your fire becomes larger than you can handle by yourself. Finally, make sure there is adequate clearance for fire safety—you don’t want it too close to your house or other structures around it!

Using landscape fabric, mark and lay out the square shape of the fire pit.

To ensure a square fire pit, you’ll need to measure and mark out the outline using landscape fabric. Here are some tips for making sure your fabric is straight and square:

  • Use a garden hose or rope to create a square outline of the fire pit.
  • Use spray bottles of water to wet down any loose dirt around the area that you want to keep dry. This will help keep weeds from growing in later on!
  • If possible, use string lines or stakes at opposite corners of your marked rectangle so that they form 90° angles (see diagram below). This will make it easier when laying out your landscape fabric because it ensures that all four sides are perfectly straight and aligned with each other! You can use measuring tapes if necessary but there isn’t one needed unless something doesn’t look right about how things were measured out before putting down any layers over top those existing outlines made by using stakes/stringlines etcetera – otherwise just follow these steps again until everything looks good enough without having too much gaps between materials being used so that nothing gets damaged during construction work done later on down road when building up walls inside these areas where no grasses grow anymore after removing them…

Set the retaining wall blocks in place to create the first layer of the square shape.

The first layer of your square shape should be created by setting the retaining wall blocks in place. You want to make sure that these blocks are level with one another and if you’re not confident in your ability to do this, use a level or some other method for measuring. You can use a metal pole, string line or even a laser level to make sure the blocks are all at the same height as each other.

Continue laying block layers upon each other, ensuring that the blocks are level with one another.

The next step is to continue laying block layers upon each other, ensuring that the blocks are level with one another. Begin by using a level to check the blocks. If necessary, use a straight edge to check them as well. If you don’t have any tools available for this task, you can use a string and yardstick in addition to your eyesight alone!

If none of these methods are working for you and you’d like to take things further than the basics here’s what I’ve found works best: Use lasers levels! These handy gadgets make it so easy because they provide accurate readings every time no matter what angle or situation you’re facing when trying out different techniques on how best place your retaining wall blocks together as shown below:

Fill in empty spaces between blocks with smaller blocks or crushed gravel.

Fill in empty spaces between blocks with smaller blocks or crushed gravel.

To keep the fire pit safe and protected, cover it with a grill that is at least 3 inches above the surface of the block and use a heavy gauge metal for your grate. Use coal or wood as fuel. If you are using charcoal briquettes, spread them out over an area larger than one square foot so that they are not too close together and do not touch each other when burning. After lighting them, allow them to burn down to white ash before adding more fuel. Keep matches away from children while lighting fires (or anything else), keep flames away from flammable materials such as dried leaves or grasses around your home, be aware of wind conditions when building fires outdoors so they don’t fly out of control into nearby trees/shrubs/furniture etc., never extinguish smoking embers by pouring water onto hot coals – this will create smoke which can be toxic if inhaled!

Continue building up the layers until you reach your desired height.

You’ll want to keep checking the blocks as you build up the layers. Make sure they are level with one another and square. Also, make sure the fire pit sits level with the ground and that your retaining wall sits level with your fire pit.

Create a capstone or capping layer to seal off and complete the building of your fire pit.

  • Using a metal pole as a guide for setting blocks, lay retaining wall blocks in the following way:

1 block vertically on each side of the fire pit opening (8 total)

2 blocks at an angle, one on either side of the vertical stack (4 total)

  • Fill in any gaps between capstones with smaller retaining wall blocks or stone.

Keeping it square is important – consider using a metal pole as a guide for setting your blocks

Keeping it square is important, so consider using a metal pole as a guide for setting your blocks.

Take a look at the image below and you can see how using a metal pole as a guide for setting up your retaining wall blocks will help keep things straight and level.

The next step is to use a spirit level to check that all of your retaining wall blocks are level.

To do this, place the spirit level on top of each block in turn (you may need to use two people for this). If any of them aren’t sitting flat on the ground or leaning either way too much then take them out and adjust them until they’re flat with each other


There you have it. Now you know how to build a DIY fire pit with retaining wall blocks. It’s not as hard as it sounds, and all you need is a little time, equipment and a good plan. We hope this guide has given you the inspiration and information needed to make your own fire pit. If we can do it, then so can you!

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